Periodic solutions in a tumor-immune competition system with time-delay and chemotherapy effects

Pablo Amster, Andrés Rivera, John A. Arredondo

The main purpose of this paper is to analyze the dynamics of the system of time-delay differential equations (DDEs) \begin{equation*} \begin{split} \dot{T}(t)&=T(t) f(t,T(t))-γE(t…